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a. A flux of 0.2 x 10-4 Wb will establish sufficient attractive force for the armature of the relay of given figure to close the contacts. Determine the required current to establish this flux level if we assume that the total mmf drop is across the air gap.
b. The force exerted on the armature is determined by the equation
where Bg is the flux density within the air gap and A is the common area of the air gap. Find the force in newtons exerted when the flux specified in part (a) is established.
A cold heading operation is performed to produce the head on a steel nail. The strength coefficient for this steel is 600 MPa, and the strain hardening exponent is .22. Coefficient of friction at the die-work interface is .14.
In 2005, 5.3% of the deaths in the United States were caused by chronic lower respiratory diseases (e.g.,asthma and emphysema). In Arizona, 6.2% of deaths were due to chronic lower respiratory diseases.27 Does this mean that living in Arizona exac..
Assuming interest at 8% compounded anually and insurance at 6% of book value, determine the annual usage in hours per year for which the two alternatives are equal. If annual usage is expected to be greater than this result, which of the alternati..
High-capacity terrestrial microwave systems use double-sideband quadrature modula¬tion, the extension of QPSK, with (up to) 1024 signal points and Nyquist filtering, etc
Build something that will run/control a DC machine-nameplate is to 220V, 2.4A, and 1600rpm. Please design and explains a circuit to run and control the machine
Although this forms PNP and NPN transistors, the bias of the regions isdesigned so the junctions are reverse biased and the electric fieldeffects on the channel are supposed to control the MOS-FETtransistors operations.
For the network of given figure, find the Thévenin equivalent circuit for the network external to the load resistor RL.
A temparature sensitive transducer is subjected to a sudden temparature change. it taken 10 seconds for the transducer to reach equilibrium condition ( five time constants ). the time taken by the transducer to read half of the temparature difference..
Determine the capacitance.- Find the electric field intensity between the plates. - Find the charge on each plate if the dielectric is air.
design a resonance circuit with following specifications: L = 10 mH, RL = 4W, Imax = 200 mA, fs = 10kHz, Q = 20. That is, determine the required R, C, and supply Voltage E. For R and C, use the closest standard values.
Suppose that V1 (t)=100cos(ωt) and V2 (t)= 100sin(ωt). Use phasors to reduce the sum Vs (t)=V1 (t)+V2(t) to a single term of the form Vm cos(ωt+θ). Draw a phasor diagram, showing V1, V2 ,and Vs. State the phase relationships between each pair of t..
A proton moves around a circular path ( radius = 2.0 mm ) in a uniform .25-T magnetic field. what total distance does this proton travel during a 1.0-s time interval ( m= 1.67x10-27 kg = 1.6x10-19 C)
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